Robert and Donna eat some donuts for breakfast and then spend the morning at an amusement park. After a few hours of riding the Super Looper Double Twist Robert feels nauseous and regurgitates the donuts. Donna is fine, but Robert has developed a , and the next time they stop for donuts, Robert immediately feels ill.

a. taste aversion
b. taste response
c. unconditioned aversion
d. unconditioned response

answer; projective;

the answer is: the „power stroke“ step.

muscle contraction can be divided into a few steps:

1. the release of ach (acetylcholine) in the synaptic cleft, binding of ach for its receptor and consequently opening of the ca channels.

2. the release of ca, binding of ca for the troponin

3. troponin shifting the tropomyosin, which was blocking the active site on the actin

4. myosin heads attaching to actin by breaking down atp to adp+ pi

5.   formation of the ‘cross-bridge’ on the active site of the actin filament by myosin head

6. “power stroke” -the cross bridge pulls actin, which slides over the myosin

9.     7. the release of adp completes the cross-bridge movement and atp attaches to myosin, breaking the actin-myosin cross bridge.